Question

Which of the following statement(s) is/are consistent with the Bohr theory of the atom (and no other)?

(1) An electron can remain in a particular orbit as long as it continually absorbs radiation of a definite frequency.
(2) The lowest energy orbits are those closest to the nucleus.
(3) An electron can jump from the K shell (n = 1 major energy level) to the M shell (n = 3 major energy level) by absorbing radiation of a definite frequency.

Answer 1

(2) The lowest energy orbits are those closest to the nucleus.

Step-by-step explanation:

In the Bohr theory the electrons describe circular orbits around the nucleus of the atom without radiating energy, therefore to maintain the circular orbit, the force that the electron experiences, that is, the coulombian force due to the presence of the nucleus, must be equal to the centripetal force.

The electron only emits or absorbs energy in the jumps from one allowed orbit to another, with only one jump occurring at a time, from layer K (n = 1) to layer L (n = 2), without going through intermediate orbits. In said change it emits or absorbs a photon whose energy is the difference in energy between both levels.

In Bohr's model, it is stipulated that the energy of the electron is greater the greater the radius r, so the lowest energy orbits are those closest to the nucleus.